Chapter VI of the Patent Rules, 2003 deals with Opposition proceedings. Rule 55 states that opposition by representation against the grant of a patent be duly field via Form 7 and sent to the Controller in duplicate. Rule 57 lays down rule regarding filing of a written statement of opposition and evidence.
By the Patents (Amendment) Act, 2005 a dichotomy was inserted for the first time in the Patents Act with effect from January 1, 2005 by providing for “opposition…